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1. 发明授权

US3831710A Sound absorbing panel 失效
标题翻译：声音吸收面板
公开(公告)号：US3831710A
公开(公告)日：1974-08-27
申请号：US32650873
申请日：1973-01-24
申请人： LOCKHEED AIRCRAFT CORP
发明人： WIRT L
IPC分类号： G10K11/16 , E04B1/86 , G10K11/172 , E04B1/84
CPC分类号： B32B3/12 , B32B7/12 , B32B9/005 , B32B9/041 , B32B9/045 , B32B15/043 , B32B15/08 , B32B27/08 , B32B2307/102 , B32B2607/00 , G10K11/172 , Y10T428/24149
摘要： A sound absorbing panel, generally comprising a honeycomb cellular layer, an impermeable backing enclosing one end of the cells, a permeable facing covering the other (open) end of the cells, and wherein adjacent cells are made to have a different resonant frequency. The adjacent, dissimilar, cells each have a predetermined difference in acoustic reactance and are acoustically in parallel. However, they do not act individually since their resonances combine in a useful way such that whichever cell is resonant dominates the acoustic behavior of the pair. The cell geometry is chosen such that one cell is at or near a resonance while the adjacent cell is at anti-resonance. The parallel system acts resonantly whenever either side is near resonance. As a result, sound absorption remains high over a broad range of frequencies. The functional operation of the panel is relatively independent of the materials from which it is made and may, for example, be fabricated entirely from metal. It is particularly suitable for sound attenuation in jet engines and other applications having adverse environmental conditions, requiring sound absorptive panels, baffles, duct liners, and duct splitters.
摘要翻译：吸声板通常包括蜂窝状细胞层，封闭细胞一端的不渗透背衬，覆盖细胞的另一（开口）端的可渗透面，并且其中使相邻细胞具有不同的共振频率。相邻的不同的单元各自具有预定的声电抗差，并且在声学上是平行的。然而，它们不是单独地起作用，因为它们的共振以有用的方式组合，使得无论哪个单元被谐振支配在该对的声学行为之上。选择单元几何形状使得一个单元处于或接近谐振，而相邻单元处于反谐振。每当任一侧接近共振时，并联系统共振作用。结果，吸收在宽频率范围内仍然很高。面板的功能操作相对独立于其制造的材料，并且可以例如完全由金属制造。特别适用于具有不利环境条件的喷气发动机和其它应用中的声音衰减，需要吸声板，挡板，管道衬套和管道分配器。

2. 发明授权

US3819007A Controllable laminar sound absorptive structure 失效
标题翻译：可控的LAMINAR声音吸收结构
公开(公告)号：US3819007A
公开(公告)日：1974-06-25
申请号：US35516173
申请日：1973-04-27
申请人： LOCKHEED AIRCRAFT CORP
发明人： WIRT L , MORROW D
IPC分类号： E04B1/74 , E04B1/84 , E04B1/86 , G10K11/172 , E04B1/82
CPC分类号： B32B3/266 , B32B3/12 , B32B2307/102 , E04B1/86 , E04B2001/748 , E04B2001/8428 , E04B2001/8433 , G10K11/172 , Y10T428/24149 , Y10T428/24273
摘要： An acoustical facing sheet comprising a permeable member having perforations therethrough and tubular elements extending therefrom on one side in register with said perforations. The structure provides a lumped acoustic impedance having an acoustic resistance proportional to frequency, and an acoustic inertance that is inversely proportional to frequency. It permits the design of highly efficient laminar-type sound attenuating panel structures having an unusually low first resonant frequency without impairing performance at the higher frequencies, and occupying smaller volume than prior devices.
摘要翻译：一种声学表面片，其包括具有穿孔的可渗透构件，以及从其一侧延伸的管状元件，与所述穿孔对准。该结构提供具有与频率成比例的声阻抗的集中声阻抗和与频率成反比的声惯性。它允许设计具有非常低的第一谐振频率的高效层状声音衰减面板结构，而不会损害较高频率的性能，并且占据比现有装置更小的体积。

3. 发明授权

US3734234A Sound absorption structure 失效
标题翻译：声音吸收结构
公开(公告)号：US3734234A
公开(公告)日：1973-05-22
申请号：US3734234D
申请日：1971-11-08
申请人： LOCKHEED AIRCRAFT CORP
发明人： WIRT L
IPC分类号： E04B1/74 , E04B1/84 , E04B1/86 , F02K1/82 , F16L55/033 , G10K11/172 , E04B1/82
CPC分类号： F16L55/033 , E04B1/86 , E04B2001/748 , E04B2001/8428 , E04B2001/8433 , F02K1/827 , G10K11/172 , Y02T50/671 , Y10T428/24149 , Y10T428/24273
摘要： A sound absorbing structure, generally comprising a honeycomblike cellular layer, an impermeable backing closing one end of the cells, a permeable facing covering the other end of the cells, and oblique porous or permeable partitions having a specified flow resistance in each cell, for providing controlled acoustic absorption over a wide range of frequencies and having a minimum ability to wick and retain liquids. The operation of the structure is relatively independent of the materials from which it is made, and may for example be fabricated entirely from metal. It is particularly suitable for sound attenuation in jet engines and other adverse environmental conditions requiring sound absorptive panels, baffles, duct liners, and duct splitters.
摘要翻译：通常包括蜂窝状细胞层的吸音结构，封闭细胞的一端的不渗透背衬，覆盖细胞另一端的可渗透面，以及在每个细胞中具有特定流动阻力的倾斜多孔或可渗透隔板，用于在宽范围的频率上提供控制的吸声，并具有最小的吸附和保持液体的能力。该结构的操作与其制成的材料相对独立，并且可以例如完全由金属制成。它特别适用于喷气发动机中的声音衰减和其他需要吸声板，挡板，管道衬套和管道分配器的不利环境条件。

4. 发明授权

US3824842A Apparatus and method for the measurement of acoustic absorption and impedance 失效
标题翻译：用于测量吸声和阻抗的装置和方法
公开(公告)号：US3824842A
公开(公告)日：1974-07-23
申请号：US24577672
申请日：1972-04-20
申请人： LOCKHEED AIRCRAFT CORP
发明人： WIRT L , MORROW D
IPC分类号： G01N29/09 , G01N29/00
CPC分类号： G01N29/09 , G01N2291/02491
摘要： Apparatus and method for measuring the acoustical impedance and/or the absorption coefficient of materials of the class which exhibit nonlinear behavior at high sound intensities. A highintensity biasing noise having a broadband spectrum and a low intensity pure sinusoidal tracer tone are introduced in combination into a standard impedance tube or standing-wave apparatus. The standing-wave pattern in the tube is measured by a pressure microphone probe movable along the axis of the tube. The tracer tone is retrieved by highly selective filtering and used to provide a measurement signal which corresponds to the response of the material. By sampling the standing wave pattern in the tube, the entire spectrum of the broadband noise response may be obtained.
摘要翻译：用于测量在高声强度下表现出非线性行为的类的材料的声阻抗和/或吸收系数的装置和方法。将具有宽带频谱和低强度纯正弦曲线色调的高强度偏置噪声组合引入到标准阻抗管或驻波装置中。通过可沿着管的轴线移动的压力麦克风探头来测量管中的驻波图案。通过高度选择性滤波检索示踪音，并用于提供对应于材料响应的测量信号。通过对管中的驻波模式进行采样，可以获得宽带噪声响应的整个频谱。

5. 发明授权

US3820627A Apparatus for noise and air pollution abatement 失效
标题翻译：噪音和空气污染评估装置
公开(公告)号：US3820627A
公开(公告)日：1974-06-28
申请号：US28442372
申请日：1972-08-28
申请人： LOCKHEED AIRCRAFT CORP
发明人： WIRT L
IPC分类号： B23Q11/00 , E04B1/82 , G10K11/16 , E04B1/84
CPC分类号： G10K11/161 , B23Q11/0046 , B23Q11/0078 , B23Q11/0096 , Y10S454/906
摘要： A system for simultaneously controlling airborne noise and air pollutants. Comprises an acoustic panel or enclosure constructed of a permeable sheet separated by an air space from an impermeable sheet, and includes means for inducing a ventilating flow of air through the permeable sheet. The air flow and permeability of the sheet are selected to lie within a specified range such that Delta p/u about Z where Delta p is the differential pressure across the sheet, u is the velocity of air approaching the sheet, and Z is the characteristic impedance of air. Especially suitable for ventilating hoods, enclosures, or semi-enclosures for machine tools, spray booths, welding apparatus, and the like.

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